Why is passive immunity effective for only a short time?
A.
Antibodies are rapidly broken down.
B.
Antigens are rapidly broken down.
C.
Memory cells soon die.
D.
Phagocytes soon die.
Exam No：9700_w24_qp_12 Year：2024 Question No：38
Answer:
A
Knowledge points:
11.2.1 relate the molecular structure of antibodies to their functions
11.2.2 outline the hybridoma method for the production of monoclonal antibodies
11.2.3 outline the principles of using monoclonal antibodies in the diagnosis of disease and in the treatment of disease
11.2.4 describe the differences between active immunity and passive immunity and between natural immunity and artificial immunity
11.2.5 explain that vaccines contain antigens that stimulate immune responses to provide long-term immunity
11.2.6 explain how vaccination programmes can help to control the spread of infectious diseases
Solution:
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